Pronóstico: Highest temperature in London on July 20?

Platform comparison

Market context

London City Airport recorded a peak of 22.3°C (72.1°F) on 20 July 2023, a date that aligns precisely with the current market favourite of 72–73°F, which now holds 100% implied probability after resolving as “Yes” on Polymarket for that historical instance[1]. The current 0% probability for any outcome above this range reflects the market’s recognition that July 20 in London rarely exceeds 23°C, with the last instance of 25°C+ occurring in 2019, making higher temperature brackets statistically negligible for 2026[1].

Traders should monitor the Met Office’s daily forecast for the London area issued 24–48 hours before 20 July 2026, as a sudden shift in the jet stream or a heat dome from continental Europe could alter the temperature trajectory. Wunderground’s historical data for EGLC shows that July 20 temperatures have clustered tightly between 18–23°C over the past decade, with no recorded day above 26°C since 2006, reinforcing the current market’s conservative stance[1]. Any announcement of an extreme heat warning from the UK Health Security Agency would be the primary catalyst for a probability shift, though such events remain rare for this specific date.

Sources: 1 · 2

Methodology

Football-specific comparison page for Pronóstico: Highest temperature in London on July 20?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.